Sea to Summit Triathlon

Sea to Summit Triathlon (July 31, 2027)

Sea to Summit is a largely self-supported long-distance triathlon that starts in the coastal village of South Berwick, Maine and finishes atop Mt. Washington in the White Mountains of New Hampshire. The course is made up of three consecutive segments:

• 1.2-mile swim
• 95-mile bike
• 5.5-mile run and climb to the summit

The event enforces strict qualification standards. Age-group athletes must have completed either a 140.6 distance triathlon in 14:15 or less, or a 70.3 distance triathlon in 6:15 or less, and have placed within the top 75% of their age group in a qualifying race held after January 1, 2021. Previous Sea to Summit finishers from 2014–2025 within the time limit and current or former card-carrying professional triathletes are pre-qualified. The race directors may accept other athletes if they can demonstrate swim proficiency and the ability to meet checkpoint cutoffs. Competitors must be at least 18 years old.

Each competitor must designate a healthy support person or porter who remains with the athlete through packet pickup, the athlete meeting, the course drive to the mountain base, bike retrieval at T2, meeting at the summit, and post-race transport. The porter requirement is mandatory.

The race is USAT sanctioned. Competitors must hold an annual or one-day USA Triathlon membership; one-day license costs are stated by USA Triathlon. Results count toward national and regional rankings and USAT rules apply.

Medical staff, lifeguards, and professional mountaineering guides are provided, but athletes and their porters are largely responsible for planning and safety. No transfers or substitutions are allowed and refunds are available only if Refund Protect is purchased; deferments are allowed for a fee up to 60 days before the race. Entry fees listed for registration are $525 for individuals and $690 for relay teams. Visit the organization's website for the most recent information.

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